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Peloton: Fitness & Workouts ($13/month and up)

"While I have a Peloton bike at home, I love the app for strength training and barre when I'm traveling. And when I don't even have access to a gym, I go for the standing core classes — a good workout without having to lie down on a questionable hotel room floor," Wu says. She tries to prioritize her physical and mental health by getting in a daily workout, alternating between spinning, strength training, and barre.

Downing the app is free, but in order to participate in the workouts, you'll have to purchase a plan. You can stream the classes on an iPhone, iPad, TV, computer, or sync to any screen via AirPlay. Whether you join live classes or compete against yourself by taking the same ones over and over, there's no denying the quality that comes with these workouts. Read up on Peloton membership prices here.